I’d love to, but I’ve moved on from instructing instrumentation at a technical college. It was a lot easier to make these videos when I worked at the college. Sorry…
hello. thanks for he great content. can you tell me where i can find a layout or scheme with complete description, for that trainer metal board you show us in this video? thank you
This trainer board was designed and built in-house. DeltaV parts were sourced from Spartan Controls, electronic connectors from DigiKey and the aluminum board was cut out using a waterjet cutter at Red Deer Polytechnic (RDP) formerly know as Red Deer College (RDC).
Well explained, but the ZN method always give oscillating results, most of the time too agressive control and not robust enough, especially for the chemical industry like the example shown here. It's well known because teached in school, but that's the only good point on this method ;-) - And would you imagine doing this closed loop test, bringing the process to "critical oscillation" in a real factory where dangerous things can happen ? Well you can try asking that but in general the answer of operations people is no... (and they are right...). But once again the method is well explained, that's good !
lololebo1083 that’s exactly right! The closed-loop method requires the process to be put into sustained oscillation. Any process where this is not possible you must not use this tuning method. You would likely need to use an open-Loop method. The original calculations for Zeigler-Nichols targeted a 1/4-amplitude-decay response for normal operation, but there are modified calculations that will produce a critically damped response.
I just started watching some of your videos and finding them helpful, thanks. At 3:00, you mentioned something about a HART field valve parameter to write the range values to the pressure transmitter. Could you elaborate on that? I don't think I remember seeing that in your "Commissioning a Controller" video, am I mistaken? At 3:50, you describe a fuse being wired in series with the transmitter - I'm assuming that is a vendor requirement for the transmitter? I don't remember seeing that done on most sites where I've seen these installations. My 3rd and final question has to do with a comment you made that you are using DeltaV "Operate" in this video. In another video, I believe you said you were using "Plant Web Experience" and I wondered what are the differences between these platforms?
djl here is my video on the HART_Field_Val parameter: HART_FIELD_VAL Parameter -- DeltaV 12.3.1. Fuses are frequently used to prevent shorting and damaging an input. Some users put fuses on each loop. This also makes it easy to remove power from an individual device.
Dear sir, ur video is very informative, can you create full DCs programming and scada graphics designing training
I’d love to, but I’ve moved on from instructing instrumentation at a technical college. It was a lot easier to make these videos when I worked at the college. Sorry…
hello. thanks for he great content. can you tell me where i can find a layout or scheme with complete description, for that trainer metal board you show us in this video? thank you
This trainer board was designed and built in-house. DeltaV parts were sourced from Spartan Controls, electronic connectors from DigiKey and the aluminum board was cut out using a waterjet cutter at Red Deer Polytechnic (RDP) formerly know as Red Deer College (RDC).
Thank you. Looking forward to more of your DeltaV videos.
PLCprogrammer more to come!
Well explained, but the ZN method always give oscillating results, most of the time too agressive control and not robust enough, especially for the chemical industry like the example shown here. It's well known because teached in school, but that's the only good point on this method ;-) - And would you imagine doing this closed loop test, bringing the process to "critical oscillation" in a real factory where dangerous things can happen ? Well you can try asking that but in general the answer of operations people is no... (and they are right...). But once again the method is well explained, that's good !
lololebo1083 that’s exactly right! The closed-loop method requires the process to be put into sustained oscillation. Any process where this is not possible you must not use this tuning method. You would likely need to use an open-Loop method. The original calculations for Zeigler-Nichols targeted a 1/4-amplitude-decay response for normal operation, but there are modified calculations that will produce a critically damped response.
lololebo1083 Thank-you for your input!
It seems to illustrate two ZN tuning methods. Am I right?
Liqing Huang The tune performed in this video is Ziegler-Nichols closed-loop tune. The open-loop tune is not performed in this video.
very well explained...
I just started watching some of your videos and finding them helpful, thanks. At 3:00, you mentioned something about a HART field valve parameter to write the range values to the pressure transmitter. Could you elaborate on that? I don't think I remember seeing that in your "Commissioning a Controller" video, am I mistaken? At 3:50, you describe a fuse being wired in series with the transmitter - I'm assuming that is a vendor requirement for the transmitter? I don't remember seeing that done on most sites where I've seen these installations. My 3rd and final question has to do with a comment you made that you are using DeltaV "Operate" in this video. In another video, I believe you said you were using "Plant Web Experience" and I wondered what are the differences between these platforms?
djl here is my video on the HART_Field_Val parameter: HART_FIELD_VAL Parameter -- DeltaV 12.3.1. Fuses are frequently used to prevent shorting and damaging an input. Some users put fuses on each loop. This also makes it easy to remove power from an individual device.
djl DeltaV operate is part of the PlantWeb Experience package that Emerson sells. DeltaV Operate is software for building and view HMI screens.
@@AutomationCliff Thanks, that it what I thought, but it wasn't entirely clear.
djl no problem!